Tips: Flash memory vendors are using decimal arithmetic:1MB = 1000KB，1G = 1000MBcalculated， the operating system using binary arithmetic:1MB = 1024KB，1GB = 1024MB;so there are some differences between display capacity and nominal capacity of flash memory product64G is about 59.5G;Sellers experience:The first time I saw this product ，I was shocked ，because it’s really interesting ，but after use it ， I feel it’s not just interesting but very useful .My phone installed a lot of Apps and there are many photos inside ， phone memory is not enough ，but after use this i-flash ， All problems solved!1. I moved most of old photos to the i-flash Device， my phone have more space to store new photos (It can be directly connected to the phone and move the photo in the phone to the i-flash ).2. I can see the movie in the i-flash ，it as a extra memory of the phone ， I can use it to see the movie inside ，it’s really cool !3. When I travel work， I can open the Word/Excel/Power point /PDF inside to check the quotes and information，Super Uesful !(this i-flash deveice support nearly 40 files type ^_^)